Process for treating molybdenum ores



A. KISSOCK. PROCESS FOR TREATING MOLYBDENUNIVORES. APPLICATIONI man MAY 6,1918. RENEWED Aue.15.192x.

1,41639935) Patented Jail. 10, 1922.

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T o all 'whom t may concern PATENT ori ALAN KJISSOCK, 0F TUCSON, ARIZONA.

:PROCESS FOR TREATING MO'LYBIDENUNI CRES.

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specmarion df Lettersratent. Patented-Jan, im, 92a

Application filed May 6; 1918, Serial No. 232,586. Renewed August 15, 1921. Serial No. 492,636.

Be it known'that I, ALAX KissocK, a citi- -zen of the United States, residing at Tucson,

,county of Pima and State of Arizona, have invented certain new and useful Im rovements in Processes for Treating Mo ybdenum Orcs; and I do declare the following tobe a fulll clear, and-exactldescription of the invention, such as Will enable others skilledv in theiart to whichv it appertains to make vanduse'the same, reference being had The process is set forth diagrammatically y in the accompany-ing drawing.

Both of the two principal molybdenum ores may be handled, namely,v wulfenite (PbMoQ and molybde'nite (MoSz). In the case .of the latter, a preliminary roasting to convert the suliid to oxid (M003) is necessar Y 'Ilhe ore is crushed to 200 mesh or finer and' is then placed in an agitator and while being agitated is boiled with a solution of a.

sodium saltor other compound which will dissolve the molybdenum. vIn. the case of' filtered oil', the residue being `further treated it desired for such values as it contains.

The molybdenum solution is conducted to another agitator and boiled therein With'a suitable agent for precipitating, the molybdenum in a desirable insoluble form. Such 'an agent is preferably'some soluble salt of calcium', as calcium chlorid (CaCl2), in Wh?l h case the molybdenum is recipitated as calcium molybdate (Gah/5304). molybdenunr'product is filtered from' the solution and is then ready for the electric furnace or other commercial use, the solution being discarded or reused as advantageous or desirable.

lVhat I claim is l. In a process for recovering molybdenum as a salt. the step comprising dissolving a molybdenum compound in a solution of a sultid of an alkali-metal.

2. Thel process of recovering molybdenum as a salt, comprisingr dissolving a molybdenum compound by boiling in a solution of a suld of an alkali-metal and boiling the solution obtained with a soluble alkali-earth compound to precipitate the molybdenum iIi an available insoluble form.

3. The proccssoi recovering molybdenum as a salt, comprising dissolvingy the molybdcnum compound in a soiutionot a suliid ot' an alkali-metal, and treating the solution obtained with a soluble alkali-earth compound to precipitate the molybdenum in insoluble form.

4. The process of 'recovering molybdenum as a salt, comprising dissolving a molybdenum compound in a solution of a suliid of an alkali-metal, and treating the solution obtained with a soluble calcium compound to precipitate the molybdenum as calcium .i

molybdate. l

5. The process of recovering molybdenum as a salt, comprising dissolving a molybdenumcompound b boiling in a solution lof a sulfid of an alka i-metal and boiling the d solution obtained with a solution of a calcium salt to obtain' the moiybdenum in an available insoluble form.

In testimony whereof I aix' my signature.

f ALAN KISSDCK.

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